Installed the Hydroboost but....

[Bob-Lob-Law]

I installed the Hydroboost as per the links and vids that were posted here.  I bled all the breaks as well as the master cylinder by doing a gravity bleed and the old pump and hold.  However, my pedal goes all the way to the floor.  I thought that it would stiffin up after I bled everything, however no matter what it still goes all the way to the floor.  I also made sure that the rear brakes were set properly.  No matter how much I bleed the brakes, the pedal goes to the floor. 

As always, I would greatly appreciate any help. 

[Steve Wood]

did it bleed correctly when you did the old pump the pedal method?

[Bob-Lob-Law]

Yes, although I didn't see much if any air at all.  I also made sure that I tightened up the fitting while there was fluid still coming out. 

[PacecarTA]

the master cant bleed by gravity , it needs to be bench bled ,  can do on car  but bore has to be level to do that

also make sure the output rod is still there between the master and the hydro unit

[Bob-Lob-Law]

Roger, I'll get the MC bled as soon as I can.  Man, that's going to be a mess.

[Steve Wood]

Not necessarily... so, as Paul says, you did not bleed the mc before installing it, that is a major no-no.

Two ways to do it.  Most master cylinders, when purchased, come with a couple of fittings that screw into the ports and curl back into the reservoir and submerge in the fluid in the reservoir.  YOu pump until you have a solid stream going up the tubes and into the reservoir without any air bubbles in the reservoir at the end of the tubes.

I think that might be the best way unless you have a pressure bleeder to force the fluid thru the cylinder from the reservoir side.  If you did not get those fittings, you can probably pick them up at the parts store?

[Steve Wood]

Oh, yeah...take it off the car and put it in a vise so its level....here is one link but you can find many if you look   http://www.superchevy.com/technical/chassis/brakes/0509sc_bench/

[Bob-Lob-Law]

Ok, I was bleeding the MC while it was on the car and the pedal feels like it is getting a lot stiffer.  There must be a metric ton of air in there.  I'll be bleeding them for a while. 

Thanks for all the support.

[Bob-Lob-Law]

Steve, just read your post.  Yeah, I did the major no no.  I'll get that taken off and done properly tomorrow. 

Thanks again.  Yeah, I'm that slow learner.  Plus being the major geek doesn't help either. 

[PacecarTA]

no need for tubes , they include plastic plugs now to bench bleed

thread them in tight
put enough fluid in reservior to keep bores covered
 with master bore level ..they suggest putting master into a bench vise  but i just prop the end against a wall
depress the piston slowly (dont want a million little air bubbles in the fluid ), repeat  until the bubbles all come out into the reservior  , you can alternate holding one end  a litlle high then the other 
once the fluid flows without any bubbles its ready to install

install master and  install front and rear brake lines 
with someone in car break loose one fitting at master and have them very slowly push pedal in allowing  bubbles in fluid to come out at fittings , tighten and repeat for other fitting

if you didnt take any other part of the brake system apart that would usually be it.
you should have a good pedal
 if you cracked the lines at prop or wheels you will need to bleed the system entirely. 

a power bleeder would be easiest and even though i have one of those i still do most system bleeds using the mity vac hand pump bleeder at each wheel. 

[Steve Wood]

If you do it the way Paul described above, the rod that you are using to pump the piston with (something like a big phillips screwdriver will work) will get very firm when the air is out.

[PacecarTA]

  yep should get firm , if it wont get firm off car it wont get better on the car and would indicate a bad master

[Charlief1]

Just out of curiosity, did you get a new or remanned master?

[Bob-Lob-Law]

Roger all.  Thanks for the step by step.  I'll get that done. 

@Charlief1, it was a reman.

[Bob-Lob-Law]

BTW, Steve, I have been running the car a couple of times and she is purring like a kitten.  She is really sounding nice.  I'll post my scanmaster readings here sometime next week.

YOU are the MAN!